Wolseong Units 2, 3, and 4 (each approximately 700 MW CANDU-6 pressurised heavy water reactors) began commercial operation between 1997 and 1999 and reached the end of their design lifespans between late 2026 and 2029. They have been in shutdown for maintenance since 2025. Calls are growing to extend operating lives for another decade. KHNP is submitting safety assessment reports for continued operation. Candu Energy (AtkinsRéalis) is positioning to support life extension through its CANDU refurbishment expertise. Combined capacity of 2,100 MW.